1
Atomic Structure & Properties
Moles and molar mass, mass spectrometry, elemental composition, electron configuration, photoelectron spectroscopy, and periodic trends.
AP Chemistry Units
All nine units of the AP Chemistry course framework, with approximate exam weighting and topic counts. The course runs from atomic structure through bonding, states of matter, reactions, kinetics, thermodynamics, equilibrium, and acid-base chemistry. Approximate weightings are from the College Board Course and Exam Description; exact weightings vary year to year.
Total units
9
Total topics
~80
Heaviest unit
Unit 3
Second heaviest
Unit 8
2
Compound Structure and Properties
Ionic, covalent, and metallic bonding, Coulombic attraction, Lewis diagrams, resonance and formal charge, VSEPR, and hybridization.
3
Properties of Substances and Mixtures
Intermolecular forces, states of matter, the ideal gas law and kinetic molecular theory, solutions, and spectroscopy. The heaviest unit on the exam.
4
Chemical Reactions
Net ionic equations, physical and chemical changes, stoichiometry, titration, and the major reaction types including acid-base and redox.
5
Kinetics
Reaction rates, rate laws, the collision model, reaction energy profiles, multistep mechanisms, and catalysis.
6
Thermodynamics
Endothermic and exothermic processes, enthalpy, calorimetry, Hess's law, and bond enthalpies.
7
Equilibrium
Reversible reactions, the equilibrium constant, the reaction quotient, Le Chatelier's principle, and solubility equilibria.
8
Acids and Bases
pH and pOH, strong and weak acids and bases, buffers, titration curves, and molecular structure effects on acid strength.
9
Applications of Thermodynamics
Entropy, Gibbs free energy, thermodynamic favorability, and the connection between free energy, equilibrium, and electrochemistry.
Units 1 through 5 are fully built with diagnostics, drills, lessons, and cumulative MCQ exams. Units 6 through 9 are in progress: topic hubs, lessons, and diagnostic banks are rolling out.